Discworld 05 - Sourcery
Terry Pratchett
Крокодил, 1963 , № 18
Krokodil Magazine
Техника - молодежи №12 1958
Tekhnika Molodezhi Magazine
Наука и жизнь #10 2008
Nauka i Zhizn Magazine
Reiffen's choice
S. C. Butler
Stoneways (1)